99c4e02ecf
Name it instead "topics" so it won't be strange if some topics included "exercises" directory.
55 lines
1.1 KiB
Markdown
55 lines
1.1 KiB
Markdown
## Containerize an Application
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1. Clone an open source project you would like to containerize. A couple of suggestions:
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```
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https://github.com/bregman-arie/node-hello-world
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https://github.com/bregman-arie/flask-hello-world
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```
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`git clone https://github.com/bregman-arie/node-hello-world`
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2. Write a Dockerfile you'll use for building an image of the application (you can use any base image you would like)
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```
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FROM alpine
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LABEL maintainer="your name/email"
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RUN apk add --update nodejs npm
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COPY . /src
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WORKDIR /src
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RUN npm install
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EXPOSE 3000
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ENTRYPOINT ["node", "./app.js"]
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```
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3. Build an image using the Dockerfile you've just wrote
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`docker image build -t web_app:latest .`
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4. Verify the image exists
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`docker image ls`
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5. [Optional] Push the image you've just built to a registry
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```
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docker login
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docker image tag web_app:latest <your username>/web_app:latest
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# Verify with "docker image ls"
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docker image push <your username>/web_app:latest
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```
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6. Run the application
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```
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docker container run -d -p 80:3000 web_app:latest
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```
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7. Verify the app is running
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```
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docker container ls
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docker logs <container ID/name>
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# In the browser, go to 127.0.0.1:80
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```
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